GQ is usually my first stop if looking online - good prices, good range, and they do the mail order thing very well. My Smoking Shop is another I use occasionally. Used to buy quite a bit from Smoke King, but not recently (for no particular reason, although I was less than pleased when they stopped stocking Germain's tobaccos due to supply issues with Special Latakia Flake about 3 years ago). I do like to pop into the local B&M, though, not least because it's not too far from where I work, and I can sniff the loose baccies before I decide to buy. Not quite on first name terms, but my face was recognised when i was in yesterday to stock up on Peterson's Perfect Plug and get a pouch of Germains Rich Dark Flake to try.
I like the PPP - I went through a phase of trying various plugs, liked Warrior and then found it had been discontinued when I went to get more, so tried PPP and reckon it's pretty similar. Also tried some of the unflavoured (or no more than Lakeland) Gawith plugs, which were interesting, but not quite what I was after. That being: generally dark and mellow, flavoursome but not too strong tasting, and not leaning too much towards Virginia. Also wanted something pretty dense that would be resistant to drying out, meaning it would last well (in a resealable bag) in a pouch.
After one bowl so far, the Rich Dark Flake seems pretty good - dark and earthy, slightly piquant at times, cool burn. Comes in actual flakes (unlike SLF), which are long, wide and thin, probably enough for two average bowls per flake. Moisture was about right, and it rubbed out pretty easily (although not quite as easily as St Bruno Flake).
On cellaring, if it comes in a vacuum sealed tin, I leave it in the tin, otherwise, it goes into a screw-top Kilner jar. Once a tin is opened, the baccy gets jarred. The little 250ml jars comfortably take 50g of ready rubbed / ribbon cut. The big bail top jars also seal pretty well, but they have a lot more volume, so a lot more air around the baccy. I used those at first, and found that the baccy had dried out in a few cases, while the screw-tops seem to be bomb proof.